From the back of the box:
In the depths of space a holocaust has occurred. Intelligent and hostile alien life-forms have taken over the Military Research Unit in the planet Azarin 2E. Chaos and destruction have been wrought on the innocent colonists.
Now it's your job to reclaim the station for humankind. Travel through the tractless voids of space, then endure over 50 levels of Alien blasting mayhem. Watch your ammunition and energy levels in preparation for the showdown with the Alien Queen.
Fantastic new 'retreat' mode, fire as you back off
Over 50 huge levels of Alien blasting
Non-linear game sequence - Over 250 ways to complete the game
New aliens - Cocoon aliens, invisible aliens and more
Dark levels where you can only spot the Aliens by their baby-blue eyes!
CD version feature stunning 3D space-opera animation
CD version includes 17 extra levels (Alien Breed 2)